He was so well known that his bust with a quote (the response to the question "What is God?") was carved in the Gothic choir stalls of Ulm Minster.
or about 167 metres, higher than any church tower would ever attain (Ulm Minster has measured 161 metres since the 19th century), the very heavy St. Rumbold's tower was built on what had once been wetlands, though with foundations only three metres deep its site appears to have been well-chosen.
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Raff donates all revenues and royalties from his lectures and publications to charitable causes, especially, but not exclusively, in the field of preservation of sites of historical interest, e.g. for a pilgrim's hostel on the Way of St. James at La Faba or for the restoration of Ulm Minster.
At the foot of the famous Ulm Minster, forming both a contrast and a complement to this dominating late-Gothic building, the Stadthaus and Münsterplatz (minster square) were designed by the renowned US architect Richard Meier.